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  1. A transformation of the general type:
    where the central atom Z is commonly carbon. The reverse reaction is called α-addition.
    PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1088
  2. (in photochemistry) General term applied to a reaction by which a group attached to the alpha carbon of an excited chromophore is expelled either as an odd electron species or as an ionic species.
    This reaction should be distinguished from an alpha-(α-)cleavage.
    PAC, 2007, 79, 293 (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 302
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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